Abstract: To study the effects of N, P and K formulated fertilization on autumnal growth, nutrient accumulation and flower output of Osmanthus fragrans, this experiment took potted O. fragrans‘Jinyutaige’as material and adopted‘3414’incomplete regression-orthogonal design. The results showed that, flower output, peduncle length, flower diameter size, new shoot growth, leaf area, soluble sugar, soluble protein were significantly increased by moderately increasing use of N, P and K formulated fertilization. The new shoot length, roughness and leaf area reached the biggest under the treatment of higher N level and medium P and K level, namely, N3P2K2(N 3 g/pot, P 3 g/pot, K 1.5 g/pot); while soluble sugar, soluble protein, the amount of flowers, peduncle length, flower diameter size were the largest under the treatment of medium N, P and K level, namely, N2P2K2 (N 3 g/pot, P 3 g/pot, K 1 g/pot).